This is the second time in two weeks that Ontario high school teachers have walked off the job. This time, only nine school boards an involved.

The report suggests 487 fewer teachers in the Thames Valley District School Board and London District Catholic School Board by 2023-24.

The union representing Ontario's Catholic school teachers has filed a complaint against the provincial government with the Ontario labour relations board over recent changes to class sizes.

The Calgary Board of Education presented its 2019-20 budget to trustees on Tuesday and it includes bigger class sizes, layoffs and reduced services.

The head of the Saskatchewan Teachers' Federation says pay has been replaced as the biggest issue brought forward by teachers ahead of contract negotiations.

The public board is projecting 291 fewer secondary teacher positions and 38 fewer elementary teachers over the next four years.

Ford made the comments during an interview with the John Oakley Show on Global News Radio 640 Toronto on Thursday.

School boards and teachers unions have warned that the government's planned increase in class sizes will result in thousands of teaching positions being lost over the four years that change is phased in.

The government passed legislation Wednesday that will require all aspiring teachers in Ontario to pass a math test before receiving their licence to teach.

Lisa Thompson says larger class sizes will enable more group work and build skills that employers want.